{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9dd2ad5e92b962d1349a7541d167e8e214e49f95"
            },
            {
              "fixed": "3586924625559e6f9876d726c80ff0a75f0d5849"
            },
            {
              "fixed": "17fe2381f967d353183f374a1c0181a6d194158c"
            },
            {
              "fixed": "e3adf69f8eb121a9128c2b0029efd050d3649153"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.16.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64228.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethtool: phy: avoid NULL deref when PHY driver is unbound\n\nphydev-\u003edrv can become NULL while the phy_device is still attached to\nits net_device, namely after the PHY driver is unbound via sysfs:\n\n\techo \u003cmdio_id\u003e \u003e /sys/bus/mdio_bus/drivers/\u003cphy_drv\u003e/unbind\n\nphy_remove() clears phydev-\u003edrv but doesn't call phy_detach(), so the\nphy_device stays in the link topology xarray and ethnl_req_get_phydev()\nstill hands it back. ETHTOOL_MSG_PHY_GET then oopses on:\n\n\trep_data-\u003edrvname = kstrdup(phydev-\u003edrv-\u003ename, GFP_KERNEL);\n\ndrvname is already treated as optional by phy_reply_size(),\nphy_fill_reply() and phy_cleanup_data(), so just skip the allocation\nwhen there is no driver bound.",
  "id": "CVE-2026-64228",
  "modified": "2026-08-15T11:30:58.454439655Z",
  "published": "2026-07-24T15:23:11.510Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17fe2381f967d353183f374a1c0181a6d194158c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3586924625559e6f9876d726c80ff0a75f0d5849"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3adf69f8eb121a9128c2b0029efd050d3649153"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64228.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64228"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net: ethtool: phy: avoid NULL deref when PHY driver is unbound"
}